At 5'9", Isaiah Thomas is a normal sized man who wouldn't stick out in a crowd, but by NBA standards he's a dwarf. Because of this, he tends to get his balls busted at what we assume is a higher-than-average rate. An example went down on Monday night/Tuesday morning teammate when Kyle Kuzma posted this relatively cliche Instagram pic about working hard:
This led to the tandem showcasing their best Rock/Kevin Hart impression, after Thomas wondered (publicly) if Kuzma was going to pull this all summer. Kuzma hit him back by calling him "Stewart Little," a probable reference to the 1999 flick, Stuart Little.
A few people in the IG comments seemed to think that the pair was being serious, but they were not, as these tweets can attest to: